Distressed edges are really fun but there's more than way to get that “tattered look”, like using border punches. I used a postage stamp style border punch on the Grid Paper mat on this page to “distress” it:
1. Trim your mat or paper to whatever size you want and choose a fairly shallow border punch.
2. Insert the mat into the border punch only slightly–look at the punch from the bottom so that you can see that the pattern of the punch barely lines up with the edge of the paper. If you punch too far into the paper, you'll get more of a border that a distressed edge.
Like this kit? You can purchase it (already punched and cut) from my etsy shop HERE.